diff --git a/libtest.png b/libtest.png
index a3906a8..333707e 100644
Binary files a/libtest.png and b/libtest.png differ
diff --git a/tests/png/extrusions.png b/tests/png/extrusions.png
index 4784ce6..f371287 100644
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diff --git a/vitamins/extrusions.scad b/vitamins/extrusions.scad
index 6ca0afc..bcc421e 100644
--- a/vitamins/extrusions.scad
+++ b/vitamins/extrusions.scad
@@ -20,7 +20,7 @@
 // Extrusion
 //
 //                  W   H     d1     d2  sq    cw   cwi   t    st   f    recess
-E1515  = [ "E1515", 15, 15,  -2.5,    0, 5.7,  3.4,  5.7, 1.1, 1.1, 0.5, false ];
+E1515  = [ "E1515", 15, 15,  -3.3,    0, 5.5,  6.2,  9.5, 1.0, 0.9, 0.5, false ];
 E2020  = [ "E2020", 20, 20,  -4.2,   -3,   8,    6, 12.0,   2,   2, 1,   false ];
 E2020t = [ "E2020t",20, 20,  -5.0,   -3, 7.8,  6.2, 11.0, 1.8, 1.5, 1.5, [7.2, 0.5] ];
 E2040  = [ "E2040", 20, 40,  -4.2,   -3,   8,    6, 12.0,   2,   2, 1,   false ];